fix: Retreive managers from correct SmoothChunks instance

src/main/java/me/topchetoeu/smoothchunks/SmoothChunks.java

@@ -146,11 +146,9 @@ public final class SmoothChunks implements ClientModInitializer, ModMenuApi {
     }
     @Override
     public ConfigScreenFactory<?> getModConfigScreenFactory() {
-        return new ConfigScreenFactory<Screen>() {
+        return (Screen parent) -> {
-            @Override
+            var _this = getInstance();
-            public Screen create(Screen parent) {
+            return new SmoothChunksScreen(parent, _this.animation, _this.ease, _this.config);
-                return new SmoothChunksScreen(parent, animation, ease, config);
-            }
         };
     }
 }